EP 1500220 A1 20050126 - COMMUNICATION SYSTEM USING ARQ
Title (en)
COMMUNICATION SYSTEM USING ARQ
Title (de)
KOMMUNIKATIONSSYSTEM MIT ARQ
Title (fr)
SYSTEME DE COMMUNICATION UTILISANT LA DEMANDE DE REPETITION AUTOMATIQUE
Publication
Application
Priority
- GB 0208235 A 20020410
- GB 0209820 A 20020430
- GB 0218395 A 20020808
- IB 0300962 W 20030228
Abstract (en)
[origin: US7561893B2] A communication system comprises a downlink data channel for the transmission of data packets from a primary station to a secondary station and two uplink control channels, a first channel for transmission of status signals to indicate the status of received data packets and a second channel for transmission of pilot information. In operation, on detection (402) of a data packet the secondary station increases (404) the transmission power of the second channel, thereby enabling the primary station to obtain a better estimate of uplink channel properties and hence increase the accuracy with which it can decode the status signal. The secondary station transmits (406) the status signal, typically either an acknowledgement (ACK) or negative acknowledgement (NACK), and decreases (408) the transmission power of the second control channel signal. The increase and decrease in power are not necessarily identical, for example as a result of the effects of power control.
IPC 1-7
IPC 8 full level
H04B 7/005 (2006.01); H04B 7/26 (2006.01); H04L 1/16 (2006.01); H04L 29/08 (2006.01); H04L 1/12 (2006.01); H04L 1/18 (2006.01)
CPC (source: EP US)
H04L 1/1692 (2013.01 - EP US); H04W 52/325 (2013.01 - EP US); H04L 1/1809 (2013.01 - EP US); H04L 1/1858 (2013.01 - EP US); H04L 2001/125 (2013.01 - EP US); H04W 52/286 (2013.01 - EP US); H04W 52/36 (2013.01 - EP US); H04W 52/48 (2013.01 - EP US); H04W 52/50 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03085878 A1 20031016; AT E383005 T1 20080115; AU 2003208533 A1 20031020; CN 100350761 C 20071121; CN 1647439 A 20050727; EP 1500220 A1 20050126; EP 1500220 B1 20080102; JP 2005522911 A 20050728; JP 4130413 B2 20080806; US 2005143114 A1 20050630; US 7561893 B2 20090714
DOCDB simple family (application)
IB 0300962 W 20030228; AT 03706826 T 20030228; AU 2003208533 A 20030228; CN 03807820 A 20030228; EP 03706826 A 20030228; JP 2003582944 A 20030228; US 51026004 A 20041005